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HelpTest Code LAB2815 Anti-Xa Level- Unfractionated Heparin
Additional Codes:
UFH – Unfract Hep.
Notes:
Must specify/indicate UFH on lab request. Anti-Xa levels cannot be performed in house for patients on Orgaran (Danapanoid), Fondaparinux, Apixaban, and Rivaroxaban and will be referred to a reference lab for testing.
Collection:
Specimen: Blood
Container: Blue Top Tube with 3.2% (0.109 M) buffered Sodium Citrate anticoagulant only
Specimen Volume: 3.5 mL Must be filled to arrow (Greiner tube Black Disk) or line (BD)
Pediatric Collection: 2.0 mL Must be filled to arrow (Greiner tube White Disk) or line (BD)
Notes:
- Samples not filled properly will be rejected (over or under filled).
- If the patient's hematocrit is >55%, call Lab Client Services at 792-0707 to obtain an anticoagulant adjusted tube.
- For collection information and guidance refer to MUSC Laboratory Services Hemostasis / Coagulation Collection Guideline.
Stability:
Room Temperature: 2 hour Whole Blood
Refrigerated: 2 hour Whole Blood
Frozen at or below -20°C: 2 weeks
Note: Frozen samples must be platelet poor plasma aliquoted from primary tube. Label as Na Citrate or blue top plasma.
Turnaround Time (TAT):
STAT: 2 HOURS
Routine: 4 HOURS
Test Availability:
Daily / 24 Hours / Available STAT
Interpretive Data:
Unfractionated Heparin:
Therapeutic level: 0.3 – 0.7 anti-Xa IU/mL
Performed In:
COAGULATION / UMC MAIN LABORATORY